the pop-up to paste an element on a chart is not displayed. Instead, a new instance of the element is always created. There is also no message if the element already exists on the diagram.I put the visual style on microsoft office 2016 and the prespectives on default, unfortunately without success.Is there any other setting I need to set? Or is there a way to reset all user settings?

I'm trying to create an addin in VS C# which automatically creates a sequence diagram. I can add elements and I can add connectors from element a to element b, but the order of the connectors goes wrong. Example:

I set the relations as followed:1) A ---> B2) B ---> C3) A ----------> C

But 2) and 3) swapped to the following result:1) A ---> B3) A ----------> C2) B ---> C

It looks like he prints all connectors from element a first, then all from element b and so on. Is there a way to set the order of the connectors like added?